Television sets. What does it mean to refer to a 20 in TV set or 25 in TV set? Such units refer to the diagonal of the screen. A 30 in TV set also has a width of 24 inches. What is its height?
What is the height of a 30 in TV? ___ inches

Question

Television sets. What does it mean to refer to a 20 in TV set or 25 in TV set?  Such units refer to the diagonal of the screen.  A 30 in TV set also has a width of 24 inches.  What is its height?
What is the height of a 30 in TV?  ___ inches

anonymous · Answer

TVs are measured by the diagonal of their screens

anonymous · Answer

phytagorean theorem says diagonal D,W=width,H=height
 D^2=W^2+H^2
30^2 =24^2 +H^2
30^2 -24^2 =H^2
            324=H^2
        sqrt324=H
                18=H height ans